Stall fork



FIG. 1 is a perspective view of a stall fork, showing my new design therefor;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a left side elevation view, it being understood that a right side elevation view would be a mirror image of this left side elevation view;

FIG. 5 is a back side elevation view; and,

FIG. 6 is a front side elevation view. 

The ornamental design for a stall fork, as shown and described. 